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Mangirdas Grinius

@mangirdasgrinius

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Senior Linux / DevOps engineer focused on automation, reliability, and high-availability systems.

Lithuania

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What I'm looking for

I am seeking a senior infrastructure or DevOps role where I can lead automation, improve reliability, and work with high-availability systems in a collaborative, security-focused team.

I am a Senior Linux/DevOps engineer with extensive experience automating infrastructure, containerization, and maintaining high-availability systems. I have designed and managed VMware-based private clouds, Pacemaker clusters, and Kubernetes environments while supporting SAP systems and enterprise services.

At Franmax I reduced Linux server build time from two hours to ten minutes using AWX, Ansible, Packer and PAM, and I resolved critical SAP Linux issues to preserve uptime and performance. Previously I led knowledge sharing and secure infrastructure efforts at ZealiD, and implemented secrets management with HashiCorp Vault, automated deployments with Jenkins, and observability stacks including Zabbix, Grafana and ELK.

I prioritize automation, system hardening, proactive monitoring and clear documentation to ensure business continuity and efficient operations. I enjoy solving complex infrastructure problems and making deployments faster, more reliable, and easier to maintain.

Experience

Work history, roles, and key accomplishments

Current

Senior System Administrator

Current

Franmax

May 2024 - Present (1 year 4 months)

Automated Linux server provisioning in VMware using AWX, Ansible, Packer and PAM, reducing build time from 2 hours to 10 minutes; designed and maintained Pacemaker clusters and resolved critical SAP Linux issues to ensure high availability.

VMWare Ansible AWX Packer Pacemaker SAP Linux High Availability

Senior System Administrator

ZealiD

Mar 2022 - May 2024 (2 years 2 months)

Led team knowledge sharing and maintained secure, high-availability infrastructure with proactive monitoring and system hardening to ensure business continuity.

Linux Administration High Availability System Hardening Monitoring Knowledge Sharing DevOps

System Administrator

ZealiD

Nov 2020 - Mar 2022 (1 year 4 months)

Managed Ubuntu/CentOS on a private VMware cloud with minor AWS support; automated deployments with Ansible and Jenkins and implemented secrets management via HashiCorp Vault.

Ubuntu CentOS VMWare AWS Ansible Jenkins Secrets Management Automation)

Linux System Administrator

General Financing Bankas

Sep 2019 - Nov 2020 (1 year 2 months)

Managed CentOS 6/7/8 environments and deployed observability and container platforms (Zabbix, Kubernetes, Grafana, ELK, Docker) alongside Ansible to improve uptime and automation.

CentOS Kubernetes Docker Zabbix Grafana ELK Ansible Observability

Linux System Administrator

Telia Company

Sep 2016 - Aug 2019 (2 years 11 months)

Installed and configured physical and virtual servers across Red Hat, CentOS and Solaris; expanded SAN/NAS resources, maintained cluster services and updated operational documentation.

CentOS NAS Clustering Documentation

IT Administrator

Teltonika

Jan 2015 - Aug 2016 (1 year 7 months)

Performed server hardware maintenance, RAID configuration, backups for Windows and Linux systems, and network troubleshooting to maintain service availability.

Linux Windows Server RAID Backup Maintenance